The national park Alejandro de Humboldt is located in the mountain group Sagua - Moa – Baracoa, in the provinces of Holguin and Guantanamo.

For its biodiversity and endemic value and for its conservation level it constitutes the main nucleus of the biosphere reservation Cuchillas del Toa and is proposed as site of world patrimony.

The park is distinguished for ten geological formations, a region mainly made of mountains with the highest pick "Pico el Toldo", with 1175 meters above the sea level. 10 types and 14 subtypes of soil has developed in the park, you can find also 16 of the 28 plant groups existing in the country and an abundant representation of different groups of the Cuban fauna.

The climate is raining tropical in the East and tropical of savanna in the West which has given origin to the richest fluvial net of the country with five hydrographical basins and 15 sub basins, among which are relevant El Toa and Jaguani.

More than 100 species of plant with flowers and 145 ferns have been identified in the area. About 900 are endemic, which is the third part of the reported in Cuba.

The fauna is characterized for its abundance, diversity and endemism. The forests of the region are the refugees of important populations of species of both invertebrates and vertebrates. Several species of amphibious, reptiles, insects and arachnids exclusive of the park has been identified.

The largest Cuban river and its most important affluent, The Jaguani, run in the park, besides others like the Moa and  the Naranjo rivers characterized for the clearness of their waters.